Ive just put a PID kit in my botticelli from Jim Gallt- PIDKITS, source sponsor
The results have been amazing for a few reasons. They show how inaccurate my thermocouple was and the flavour from 93 C at the pf with a PID kit is very different to a surfed one. Maybe what luca and sparky have hinted about currents in a boiler when water is introduced.
All to the good